Genuine OEM pick
Milwaukee
48-11-1850
A first-party M18 pack with Milwaukee's warranty and the electronics the tools were designed around — the lower-risk default.
$67.92
Independent Cross-Compatibility Reference
Find the battery that actually fits your tools
The cordless battery & charger compatibility lab.
Pick your brand and platform — M18, 20V MAX, ONE+ and more — and see exactly which batteries, chargers, and kits fit, what crosses over, and where aftermarket packs are worth the risk.
Exact-model lookup beta
Genuine vs. aftermarket notes
Live price and stock checks
Buyer guidance only. Always confirm voltage, platform, and connector fit before you buy — battery and charger specs vary by manufacturer and can change without notice.
25
Batteries, chargers & kits mapped
7
Tool platforms covered
4
Cross-fit adapters, risk flagged
0
Sponsored placements
Exact-model beta
Resolver v1Start with the number on the label
Choose what you're holding, then enter its exact model. We separate a catalog identity from source-reviewed fit evidence and current buying availability.
Platform fallback
Don't know the model? Browse the platform
Pick your brand and battery platform to browse catalog options. Platform grouping is broader than an exact-model receipt, so verify the labels and manufacturer guidance before buying.
01 · Choose your brand
Editors' Compatibility Shortlist
Four ways to buy without wandering the whole catalog.
Start with the format that matches your routine. The full index is still below, but these are the cleanest entry points for common buyer paths.
Compact & everyday
DeWalt
DCB203
A lighter genuine DeWalt pack that makes sense for drills, drivers, and all-day carry rather than heavy-draw tools.
$38.93
High-output pack
Milwaukee
48-11-1813
Milwaukee's high-capacity FORGE pack for buyers who already know they run grinders, saws, or blowers often.
$188.99
Best all-around
DeWalt
DCB205
The mid-capacity 20V MAX workhorse — enough runtime for real work without the weight or price of a big pack.
$61.00
Compatibility Index
Battery, Charger & Kit Index
Filter by budget and use case, then sort by the spec or ownership factor that matters for your setup.
I need genuine OEM
First-party packs with full warranty and platform-safe electronics, before you spend serious money.
Open pathI mostly need compact everyday
Lighter packs that make more sense for drills, drivers, and all-day carry.
Open pathI need high-output or max runtime
Packs for heavy-draw tools and long sessions between charges.
Open pathI am comparing two options
Put specs, price, and tradeoffs side by side before deciding.
Open pathShowing 21 of 21 mapped products.
Genuine OEM
Milwaukee
48-11-1850
Platform
M18
Voltage
18V
Capacity
5Ah
Type
extended-capacity
$67.92
Genuine OEM
Milwaukee
48-11-1813
Platform
M18
Voltage
18V
Capacity
12Ah
Type
high-output
$188.99
Genuine OEM
Milwaukee
48-11-2420 / 48-59-2401
Platform
M12
Voltage
12V MAX
Capacity
2Ah
Type
compact
$59.89
Genuine OEM
DeWalt
DCB205
Platform
20V MAX
Voltage
20V MAX
Capacity
5Ah
Type
high-output
$61.00
Genuine OEM
DeWalt
DCB203
Platform
20V MAX
Voltage
20V MAX
Capacity
2Ah
Type
compact
$38.93
Genuine OEM
DeWalt
DCB609
Platform
FlexVolt
Voltage
20V/60V MAX
Capacity
9Ah
Type
high-output
$152.49
Genuine OEM
DeWalt
DCB122
Platform
12V MAX
Voltage
12V MAX
Capacity
2Ah
Type
compact
$35.25
Genuine OEM
Ryobi
PBP005
Platform
ONE+ 18V
Voltage
18V
Capacity
4Ah
Type
high-output
$54.99
Genuine OEM
Ryobi
40V High Capacity
Platform
40V
Voltage
40V MAX
Capacity
4Ah
Type
high-output
$104.99
Budget
Epowon
Replacement 2-Pack
Platform
M18
Voltage
18V
Capacity
5Ah
Type
high-output
No current Amazon offer
Read Review
Buying link unavailable while we re-verify this exact listing (checked 2026-07-13).
Budget
Generic
FlexVolt Replacement 2-Pack
Platform
FlexVolt
Voltage
20V/60V MAX
Capacity
9Ah
Type
high-output
No current Amazon offer
Read Review
Buying link unavailable while we re-verify this exact listing (checked 2026-07-13).
Cross-Platform
Milwaukee
48-59-1808
Platform
M18
Voltage
18V
Capacity
—
Type
charger
$53.99
Budget
Milwaukee
48-59-2401
Platform
M12
Voltage
12V MAX
Capacity
—
Type
charger
$18.30
Cross-Platform
DeWalt
DCB1104
Platform
12V MAX
Voltage
12V MAX
Capacity
—
Type
charger
$22.97
Budget
Ryobi
40V Quick Charger
Platform
40V
Voltage
40V MAX
Capacity
—
Type
charger
$28.98
High-Output & Heavy Tools
Milwaukee
48-59-1850
Platform
M18
Voltage
18V
Capacity
5Ah
Type
kit
$91.99
Max Runtime
DeWalt
DCB205CK
Platform
20V MAX
Voltage
20V MAX
Capacity
5Ah
Type
kit
$123.00
Max Runtime
Ryobi
ONE+ 18V High Performance Starter Kit
Platform
ONE+ 18V
Voltage
18V
Capacity
—
Type
kit
$97.70
High-Output & Heavy Tools
Ryobi
OP4040 + OP403A
Platform
40V
Voltage
40V MAX
Capacity
4Ah
Type
kit
$109.96
How the Reference Works
Compatibility-first guidance, honest tradeoffs.
Cordless batteries and chargers are not all interchangeable, even within the same brand. BatteryFits focuses on which packs and chargers actually fit which tool platforms, documented capacity and warranty terms, genuine-OEM-vs-aftermarket risk, and plain-language buyer fit.
1. Map the platform
Confirm which tool platforms (Milwaukee M18, DeWalt 20V MAX, Ryobi ONE+, and others) a battery or charger actually fits, based on published specs and connector compatibility — not guesswork.
2. Check the claims
Separate documented specs from marketing. If a brand does not clearly state voltage, capacity, or warranty terms, the guide says so.
3. Assess the buying fit
Compare options by platform fit, genuine-OEM-vs-aftermarket risk, capacity, and live price and availability. The highest-capacity pack can still be the wrong buy for your tool.
No paid placement
Affiliate links do not establish evidence or make an unsupported product eligible. Guides lead with platform fit and documented tradeoffs.
We don't bench-test cells
We do not claim to have tested or measured battery cells ourselves. Compatibility calls are based on documented specs, connector fit, and manufacturer data — and aftermarket tradeoffs are flagged honestly.
Updated when data changes
New platform releases, pricing, availability, and better-documented alternatives can move a recommendation up or down.
Learn Before You Buy
Buying Guides
Genuine vs Aftermarket Cordless Batteries: The Honest Truth
Aftermarket power-tool batteries cost a fraction of OEM packs — but are they safe? An honest breakdown of warranty, protection circuitry, fire risk, and when a cheaper pack actually makes sense.
Best Milwaukee M18 Batteries (2026): Which Pack Actually Fits Your Tools
Every M18 tool takes every M18 battery, so the real decision is capacity, weight, and whether to go genuine or aftermarket. An honest guide to picking the right M18 pack for how you actually use your tools.
How to Read Cordless Battery Compatibility (So You Don't Buy the Wrong Pack)
Voltage labels are marketing, not a spec you can compare across brands. Here is how to actually read platform names, voltage classes, and connector shapes so you buy a battery that fits your tool.
Best DeWalt 20V MAX Batteries (2026): 20V MAX vs FlexVolt Explained
Every DeWalt 20V MAX tool takes every 20V MAX battery. The real questions are how much capacity you need, whether FlexVolt is worth the upgrade, and genuine versus aftermarket. An honest breakdown.
RYOBI ONE+ 18V vs 40V: Two Separate Battery Platforms Explained
RYOBI runs two batteries that don't share a charger: ONE+ 18V for drills, drivers, and 300+ indoor tools, and 40V for mowers and outdoor power equipment. Here's what actually determines fit, and where the two genuine packs in our catalog fit in.
Keep the fit straight
Check the platform before the price
We do not run an email list yet. Use the compatibility guides and platform index for the fit details, limitations, and buying paths we have actually published.